If Iran thought it in their interest to sign the NPT and then string the world along, is this worse than Israel not signing the NPT and then stringing the world along? The NPT is long since defunct. Only Israelis wave the document, along with certain League of Nations resolutions, the Hamas charter, and the Balfour document. It is all quite silly, but people do what they believe to be in their own interest even if it appears silly to others.
Gunmen in Egypt kill guard outside Niger embassy (Reuters)
from the article: Russia 'regrets' reported Iran nuclear activity in Qom facility